CN106208820B - A kind of high-performance inverter with single-phase asynchronous motor soft start function - Google Patents
A kind of high-performance inverter with single-phase asynchronous motor soft start function Download PDFInfo
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- CN106208820B CN106208820B CN201610560917.6A CN201610560917A CN106208820B CN 106208820 B CN106208820 B CN 106208820B CN 201610560917 A CN201610560917 A CN 201610560917A CN 106208820 B CN106208820 B CN 106208820B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
- H02P1/00—Arrangements for starting electric motors or dynamo-electric converters
- H02P1/16—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters
- H02P1/42—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor
- H02P1/423—Arrangements for starting electric motors or dynamo-electric converters for starting dynamo-electric motors or dynamo-electric converters for starting an individual single-phase induction motor by using means to limit the current in the main winding
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- Power Engineering (AREA)
- Control Of Ac Motors In General (AREA)
- Inverter Devices (AREA)
Abstract
The present invention relates to inverter technical fields, disclose a kind of high-performance inverter with single-phase asynchronous motor soft start function, mainly include restrictor ring and soft start control module；Inverter acquires the margin of error between ac output current virtual value and current limliting given value, output controlling elements are obtained by restrictor ring, ac output voltage amplitude amount subtracts output controlling elements and ac output voltage virtual value feedback quantity obtains output voltage amplitude specified rate, which makes the reduction of ac output voltage value after three close-loop control；The input signal of soft start control module detection inverter, a control signal is issued to the controller of inverter when input voltage signal reaches a setting value, the controller controls the amplitude of sine wave signal according to the control signal, sine wave fundamental wave is set constantly to rise to 1 from 0, to realize gradually rising for output AC voltage.The present invention has the advantages that circuit structure is simply and reliable.
Description
Technical field
The present invention relates to inverter technical fields, more specifically, in particular to a kind of to have single-phase asynchronous motor soft
The high-performance inverter of startup function.
Background technique
Supply vehicle is also known as mobile power vehicle, it has also become important transportation and working equipment in economic construction, can be used for communicating,
The correlation emergence power such as telecommunications, coal mine, power station, oil field and outdoor study work.Essential core of the inverter as supply vehicle
Component, main function are that the unstable voltage of amplitude and frequency that supply vehicle generator issues is converted into needed for load equipment
Line voltage.Load equipment is all kinds of, wherein just including electric machinery load.Single-phase asynchronous motor with its high reliability,
It is inexpensive, easy to maintain, structure is simple, the advantages such as small in size, be widely used in household electrical appliance (air-conditioning, refrigerator, electric fan,
Washing machine etc.), electric tool, in medical instrument and light equipment.
When being directly initiated due to motor, starting current is bigger, generally 5-7 times of rated current.So big starting
On the one hand electric current can accelerate the insulation ag(e)ing of motor, reduce the service life of motor and a large amount of energy is caused to be consumed, another
Aspect proposes requirements at the higher level to the power supply capacity of starting motor, need to be equipped with the inverter times over rated capacity, this is undoubtedly
The cost of inverter is increased, when such as starting 2.1kW motor, electric motor starting maximum current reaches 70A, need to be equipped with 15kW inversion electricity
Source can just be met the requirements；Simultaneously when motor high current starting, it will lead to declining to a great extent for voltage, influence the normal of other equipment
Operation.
This excessive problem of rush of current when for electric motor starting, leading method to be offered at present has: auto-coupling voltage-reduction starting,
Silicon-controlled soft start, variable frequency starting etc..
Auto-coupling voltage-reduction starting is in the way of the multiple taps of extraction of auto-transformer, to change input voltage, the method
The requirement of different loads starting is adapted to, obtained bigger detent torque can be used to start the motor of larger capacity；But self coupling becomes
Depressor volume is big, and starting cabinet takes up space greatly, and is influenced by transformer fever, and auto-transformer reduced-voltage starting cannot too frequently
It is numerous.
Silicon-controlled soft start controls the silicon-controlled angle of flow using phase shifting control principle, makes the input voltage of motor from zero
Start, rise by the function of setting, until assigning full voltage at the end of starting.Silicon-controlled soft start belongs to stepless reduced-voltage starting,
Non-impact current when starting can introduce closed loop current control, motor is made to keep constant current during startup, it is ensured that motor steadily opens
It is dynamic.But scr promoter can cause higher hamonic wave, have a certain impact to input power；The failure high price of thyristor
Lattice are high；Silicon-controlled, silicon-controlled driving and control circuit, higher cost need to be increased newly simultaneously.
Frequency converter is the relatively good control mode of motor control effect, in addition to soft start function can be achieved, moreover it is possible to realize and become
Frequency function adjusts revolving speed and the torque of motor by control frequency.Converter technology is related to power electronic technique, control skill
Art and semiconductor technology etc., use, exploitation, maintenance cost are relatively high, are specifically applied to electric machine speed regulation and to speed control
It is required that relatively high field.
Summary of the invention
The purpose of the present invention is to provide a kind of high-performance inverters with single-phase asynchronous motor soft start function.
In order to achieve the above object, The technical solution adopted by the invention is as follows:
A kind of high-performance inverter with single-phase asynchronous motor soft start function, the inverter use voltage amplitude
It is worth ring, voltage transient ring and the instantaneous ring three close-loop control mode of electric current, further includes restrictor ring and soft start control module；It is described inverse
Variable power source acquires the margin of error between ac output current virtual value and current limliting given value, by restrictor ring obtain output control because
Son, and ac output voltage amplitude amount subtracts output controlling elements and ac output voltage virtual value feedback quantity obtains output electricity
Pressure amplitude value specified rate, the output voltage amplitude specified rate is through Overvoltage Amplitude ring, voltage transient ring and the instantaneous ring tricyclic control of electric current
Make the reduction of ac output voltage value after system；The input signal of the soft start control module detection inverter, works as input voltage
A control signal is issued to the controller of inverter when signal reaches a setting value, the controller is according to the control signal control
The amplitude of sine wave signal processed makes sine wave fundamental wave constantly rise to 1 from 0, to realize gradually rising for output AC voltage.
Further, the restrictor ring is realized by a current-limited startup circuit, and the current-limited startup circuit includes successively connecting
Voltage follower circuit, full-wave rectifying circuit, single order active filter circuit, current limliting loop circuit and the output controlling elements processing electricity connect
Road, the voltage follower circuit are connected to the output current feedback terminal of inverter, the output controlling elements processing circuit
Input terminal of the output end as voltage magnitude ring.
Further, the voltage follower circuit includes voltage follower, resistance R144 and resistance R177, the resistance
The one end R144, the one end resistance R177 are connect with the output current feedback terminal of inverter, the resistance R144 other end and electricity
The input terminal of follower is pressed to collect connection, the resistance R177 other end ground connection, and the input cathode of the voltage follower
It is connect with its output end.
Further, the full-wave rectifying circuit include operational amplifier U3A, operational amplifier U3B, diode V15 and
Diode V16；The input cathode of the operational amplifier U3A is connected by a resistance R116 and voltage follower circuit output end
It connects, input anode is grounded by a resistance R7；The cathode of the diode V15 and the output end of operational amplifier U3A connect
It connects, anode is connect by a resistance R10 with the input cathode of operational amplifier U3B；The anode and fortune of the diode V16
The output end connection of amplifier U3A is calculated, cathode is connect with the input cathode of operational amplifier U3A；The diode V16
Cathode also pass through a resistance R9 and connect with the anode of diode V15；The input anode of the operational amplifier U3B passes through one
Resistance R11 ground connection, output end are connect with single order active filter circuit, and output end also passes through a resistance R12 and its input terminal
Cathode connection, the resistance R12 also pass through a resistance R8 and connect with voltage follower circuit output end.
Further, the single order active filter circuit includes operational amplifier U3C and operational amplifier U3D, the fortune
The input cathode for calculating amplifier U3C is connect by a resistance R13 with full-wave rectifying circuit output end, and input anode passes through
One resistance R16 ground connection, output end are connect by a resistance R147 with the input cathode of operational amplifier U3D, output end
Also it is connect by resistance R14 parallel with one another, capacitor C43 with its input cathode；The input of the operational amplifier U3D is rectified
Pole is grounded by a resistance R155, and input cathode is connect by a resistance R143 with its output end, output end also with limit
Flow loop circuit connection.
Further, the current limliting loop circuit includes operational amplifier U16B and diode V13, the operational amplifier
The input cathode of U16B is connect by a resistance R148 with single order active filter circuit output end, input anode and resistance
R154, resistance R161 connection, input cathode are also connect with a resistance R145, capacitor C64, and the resistance R145 passes through an electricity
Hold C65 to connect with the output end of operational amplifier U16B, the capacitor C64 is connect with the output end of operational amplifier U16B, institute
The one end for stating resistance R154 also passes through capacitor C68 and connects, and the resistance R161 is also grounded, and the resistance R154 also connects with 5V power supply
It connects；The cathode of the diode V13 is connect with the output end of operational amplifier U16B, and anode is controlled by resistance R151 and output
Factor treatment circuit connection processed.
Further, the output controlling elements processing circuit includes operational amplifier U1C, slide rheostat RP1 and control
The input cathode of terminal processed, the operational amplifier U1C is connect with the output end of current limliting loop circuit, resistance R21, input terminal
Anode is grounded by a resistance R23, and output end is connect with a resistance R80, and output end also passes through a resistance R22 and inputs with it
Hold cathode connection；One end of the slide rheostat RP1 is connect by resistance R95 with 5V power supply, and the other end passes through resistance R20
Ground connection, control terminal are connect with control terminal；The resistance R21 also passes sequentially through capacitor EC1, resistance R42 ground connection, the resistance
R21 is also connect with resistance R20.
Compared with the prior art, the advantages of the present invention are as follows:
1, inverter of the invention uses three close-loop control mode, including voltage magnitude ring, voltage transient ring and electric current wink
Shi Huan, three close-loop control mode have excellent control performance, voltage magnitude ring and voltage transient ring in control output voltage amplitude
While control its waveform, electric current loop then not only increases the bandwidth of control system, accelerates the dynamic response of inverter
Speed, while the interference rejection ability to nonlinear load is also enhanced, reduce the harmonic content of output voltage.
2, inverter of the invention is on the basis of inverter three close-loop control, increased current limliting loop and soft start control
Module, can when heavy-duty motor starts effective limiting starting current in a certain range, when solving heavy-duty motor starting
Current over pulse problem, improves motor service life, finally realizes the soft start of motor.
3, inverter of the invention had both been able to achieve big function without increasing inverter capacity, volume and control complexity
Rate electric motor starting function, while the normal operation of other equipment can also be taken into account, current limliting and soft start control module are simple, reliably,
It is a kind of suitable type inverter of economy applied widely, function admirable.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention for those of ordinary skill in the art without creative efforts, can be with
It obtains other drawings based on these drawings.
Fig. 1 is the control principle of the high-performance inverter of the present invention with single-phase asynchronous motor soft start function
Figure.
Fig. 2 is current limliting soft start in the high-performance inverter of the present invention with single-phase asynchronous motor soft start function
The circuit diagram of control module.
Fig. 3 be in the high-performance inverter of the present invention with single-phase asynchronous motor soft start function output control because
The circuit diagram of subprocessing circuit.
Fig. 4 is the control flow of the high-performance inverter of the present invention with single-phase asynchronous motor soft start function
Figure.
Specific embodiment
The preferred embodiment of the present invention is described in detail with reference to the accompanying drawing, so that advantages and features of the invention energy
It is easier to be readily appreciated by one skilled in the art, so as to make a clearer definition of the protection scope of the present invention.
Embodiment
As shown in fig.1, the present embodiment provides a kind of, the high-performance inversion with single-phase asynchronous motor soft start function is electric
Source, the inverter use voltage magnitude ring, voltage transient ring and the instantaneous ring three close-loop control mode of electric current, further include current limliting
Ring and soft start control module；Error between the inverter acquisition ac output current virtual value and current limliting given value
Amount obtains output controlling elements by restrictor ring, and ac output voltage amplitude amount subtract output controlling elements with exchange it is defeated
Voltage effective value feedback quantity obtains output voltage amplitude specified rate out, the output voltage amplitude specified rate through Overvoltage Amplitude ring,
Make the reduction of ac output voltage value after voltage transient ring and the instantaneous ring three close-loop control of electric current；The soft start control module detection is inverse
The input signal of variable power source issues a control letter to the controller of inverter when input voltage signal reaches a setting value
Number, the controller controls the amplitude of sine wave signal according to the control signal, and so that sine wave fundamental wave is constantly risen to 1 from 0,
To realize gradually rising for output AC voltage.
In the use of the present invention, increasing a restrictor ring and soft start control module on the basis of inverter tricyclic.It is inverse
Variable power source acquisition ac output current virtual value and current limliting given value subtract each other after the margin of error, exported by restrictor ring
Controlling elements, output controlling elements size represent degree of flow restriction；Ac output voltage amplitude amount subtracts output controlling elements and friendship
Output voltage virtual value feedback quantity is flowed, is exactly final output voltage amplitude specified rate.
When starting motor, ac output current virtual value is greater than current limliting given value, output that restrictor ring obtains control because
Son increases, to reduce final output voltage amplitude given value, after the three close-loop control of inverter, ac output voltage
Value is minimized, and ac output current, that is, electric motor starting electric current is also minimized.Exactly final output voltage amplitude given value
This variable of output controlling elements is comprehensively considered, by constantly regulate for restrictor ring and inverter tricyclic, has finally realized
The decompression current-limited startup function of motor.
And be to meet when starting requirement, especially electric motor starting with load of inverter, inverter increases soft start
Function.This soft start function implementation are as follows: inverter detects the input voltage signal of inverter, works as input voltage signal
When rising to certain stable quantity, a signal is issued to controller, after controller detects signal, controls sine wave signal
Amplitude makes sine wave fundamental wave constantly rise to 1 from 0, to realize gradually rising for output AC voltage, prevents overvoltage impact
Damage load.
Meanwhile comprehensively considering the influence of electric motor starting voltage drop-out value and current limitation value to inhomogeneity load equipment
On, the two parameters of having traded off, to guarantee various kinds of equipment while work normally.
Refering to shown in Fig. 2 and Fig. 3, restrictor ring of the present invention is realized by a current-limited startup circuit, and the current limliting opens
Dynamic circuit includes sequentially connected voltage follower circuit, full-wave rectifying circuit, single order active filter circuit, current limliting loop circuit and defeated
Controlling elements processing circuit out, the voltage follower circuit are connected to the output current feedback terminal of inverter, the output control
Input terminal of the output end of factor treatment circuit processed as voltage magnitude ring.
The voltage follower circuit includes voltage follower, resistance R144 and the one end resistance R177, the resistance R144, electricity
Resistance one end R177 is connect with the output current feedback terminal of inverter, the resistance R144 other end and voltage follower it is defeated
Enter end collection connection, the resistance R177 other end ground connection, and the input cathode of the voltage follower and its output end connect
It connects.The voltage follower circuit has the characteristics that high input impedance, low output impedance, primarily serves buffering and impedance matching herein
Effect.
The full-wave rectifying circuit includes operational amplifier U3A, operational amplifier U3B, diode V15 and diode V16；
The input cathode of the operational amplifier U3A is connect by a resistance R116 with voltage follower circuit output end, input terminal
Anode is grounded by a resistance R7；The cathode of the diode V15 is connect with the output end of operational amplifier U3A, and anode is logical
A resistance R10 is crossed to connect with the input cathode of operational amplifier U3B；The anode and operational amplifier U3A of the diode V16
Output end connection, cathode connect with the input cathode of operational amplifier U3A；The cathode of the diode V16 also passes through
One resistance R9 is connect with the anode of diode V15；The input anode of the operational amplifier U3B is connect by a resistance R11
Ground, output end are connect with single order active filter circuit, and output end also passes through a resistance R12 and connect with its input cathode,
The resistance R12 also passes through a resistance R8 and connect with voltage follower circuit output end.
When in use, any small voltage change (variation reaches uV grades) can all cause two poles to the full-wave rectifying circuit
The change of the working condition of pipe V15, V16 realizes waveform overturning, is finally reached the purpose of precision rectifying.
The single order active filter circuit includes operational amplifier U3C and operational amplifier U3D, the operational amplifier
The input cathode of U3C is connect by a resistance R13 with full-wave rectifying circuit output end, and input anode passes through a resistance
R16 ground connection, output end are connect by a resistance R147 with the input cathode of operational amplifier U3D, and output end also passes through
Resistance R14, capacitor C43 parallel with one another is connect with its input cathode；The input anode of the operational amplifier U3D passes through
One resistance R155 ground connection, input cathode are connect by a resistance R143 with its output end, and output end is also electric with restrictor ring
Road connection.
The single order active filter circuit is a kind of frequency selection circuit, mainly for preventing the signal of 50Hz frequency from passing through, is obtained
To the corresponding DC quantity of output electric current, it is excellent that active filter has that small in size, high-efficient, load capacity is strong and frequency characteristic is good etc.
Point.
The current limliting loop circuit includes operational amplifier U16B and diode V13, the input of the operational amplifier U16B
End cathode is connect by a resistance R148 with single order active filter circuit output end, input anode and resistance R154, resistance
R161 connection, input cathode are also connect with a resistance R145, capacitor C64, and the resistance R145 passes through a capacitor C65 and fortune
The output end connection of amplifier U16B is calculated, the capacitor C64 is connect with the output end of operational amplifier U16B, the resistance R154
One end also pass through capacitor C68 and connect, the resistance R161 is also grounded, and the resistance R154 is also connect with 5V power supply；Described two
The cathode of pole pipe V13 is connect with the output end of operational amplifier U16B, and anode is by resistance R151 and exports at controlling elements
Manage circuit connection.
Current limliting loop circuit mainly carries out restrictor ring processing, output to given output current limiting current value and output current error value
Current limited Control factor Iset, what the size of output current limiting controlling elements represented is degree of flow restriction.
The output controlling elements processing circuit includes operational amplifier U1C, slide rheostat RP1 and control terminal, institute
The input cathode for stating operational amplifier U1C is connect with the output end of current limliting loop circuit, resistance R21, and input anode passes through
One resistance R23 ground connection, output end are connect with a resistance R80, and output end also passes through a resistance R22 and its input cathode connects
It connects；One end of the slide rheostat RP1 is connect by resistance R95 with 5V power supply, and the other end is grounded by resistance R20,
Control terminal is connect with control terminal；The resistance R21 also pass sequentially through capacitor EC1, resistance R42 ground connection, resistance R21 also with electricity
Hinder R20 connection.
Output current limiting controlling elements feed back to 9 feet of operational amplifier U1C, and ac output voltage amplitude amount is given by 5V base
Quasi- voltage obtains after slide rheostat RP1 partial pressure, and ac output voltage amplitude amount is given in addition to that need to subtract exchange output electricity
It is pressed with outside the feedback quantity of valid value, it is also contemplated that output current limiting controlling elements just obtain final output voltage amplitude specified rate.
When starting motor, ac output current virtual value is greater than current limliting given value, output that restrictor ring obtains control because
Son increases, to reduce final output voltage amplitude specified rate, after the three close-loop control of inverter in Fig. 1, exchanges defeated
Voltage value is minimized out, and ac output current, that is, electric motor starting electric current is also minimized.Exactly final output voltage amplitude
Given value has comprehensively considered this variable of output controlling elements, by constantly regulate for restrictor ring and inverter tricyclic, finally
Realize the decompression current-limited startup function of motor.
Below in conjunction with shown in Fig. 4, the realization process of soft start is further illustrated:
The realization of soft start control is completed by software, and when detecting that input voltage reaches setting value, controller executes soft
Startup program.Soft start routine process is as shown, before input voltage reaches setting value, K=0, sinewave output 0；
When input voltage reaches setting value, the amplitude stepping-in amount K of sine wave increases 1 every a stepping time Tr certainly, sinewave output value
For Y=K (sinwt)/N, in this way, the continuous increase of the amplitude stepping-in amount K with sine wave, sine wave assignment also slowly increase from 0
Greatly, in this way, output AC voltage gradually rises；When soft-start time T reaches the soft start deadline Tend of setting, just
String wave assignment increases to a reference value, to complete the soft start-up process of power supply.The amplitude stepping-in amount K of sine wave is every to be changed once
Stepping time Tr and soft start deadline Tend can be set according to load and customer requirement, also more clever when need to modify
It is living.
Inverter power circuit of the invention is simple, reliably, in addition to meeting general inverter performance requirement, solves motor
Current over pulse problem when starting improves motor service life, while because multiple without increasing inverter capacity, volume and control
Miscellaneous degree and effectively reduce inverter cost, be a kind of applied widely, function admirable economic and practical type inverter.
Although the embodiments of the invention are described in conjunction with the attached drawings, but patent owner can be in appended claims
Within the scope of make various deformations or amendments, as long as it does not exceed the scope of protection described in the claims to the invention, all should
Within protection scope of the present invention.
Claims (6)
1. a kind of high-performance inverter with single-phase asynchronous motor soft start function, the inverter uses voltage magnitude
Ring, voltage transient ring and the instantaneous ring three close-loop control mode of electric current, it is characterised in that: further include restrictor ring and soft start control mould
Block；The margin of error between the inverter acquisition ac output current virtual value and current limliting given value, is obtained by restrictor ring
Controlling elements are exported, and ac output voltage amplitude amount subtracts output controlling elements and ac output voltage virtual value feedback quantity
Obtain output voltage amplitude specified rate, the output voltage amplitude specified rate is through Overvoltage Amplitude ring, voltage transient ring and electric current wink
When ring three close-loop control after make ac output voltage value reduction；The input signal of the soft start control module detection inverter,
A control signal is issued to the controller of inverter when input voltage signal reaches a setting value, the controller is according to this
The amplitude for controlling signal control sine wave signal, makes sine wave fundamental wave constantly rise to 1 from 0, to realize output AC voltage
Gradually rise；
The restrictor ring realizes that the current-limited startup circuit includes sequentially connected voltage follow electricity by a current-limited startup circuit
Road, full-wave rectifying circuit, single order active filter circuit, current limliting loop circuit and output controlling elements processing circuit, the voltage with
With the output current feedback terminal for being electrically connected to inverter, the output end of the output controlling elements processing circuit is as voltage
The input terminal of amplitude ring.
2. the high-performance inverter according to claim 1 with single-phase asynchronous motor soft start function, feature exist
In: the voltage follower circuit includes voltage follower, resistance R144 and the one end resistance R177, the resistance R144, resistance
The one end R177 is connect with the output current feedback terminal of inverter, the input of the resistance R144 other end and voltage follower
End collection connection, the resistance R177 other end ground connection, and the input cathode of the voltage follower is connect with its output end.
3. the high-performance inverter according to claim 1 with single-phase asynchronous motor soft start function, feature exist
In: the full-wave rectifying circuit includes operational amplifier U3A, operational amplifier U3B, diode V15 and diode V16；It is described
The input cathode of operational amplifier U3A is connect by a resistance R116 with voltage follower circuit output end, input anode
It is grounded by a resistance R7；The cathode of the diode V15 is connect with the output end of operational amplifier U3A, and anode passes through one
Resistance R10 is connect with the input cathode of operational amplifier U3B；The anode of the diode V16 is defeated with operational amplifier U3A's
Outlet connection, cathode are connect with the input cathode of operational amplifier U3A；The cathode of the diode V16 also passes through an electricity
Resistance R9 is connect with the anode of diode V15；The input anode of the operational amplifier U3B is grounded by a resistance R11, defeated
Outlet is connect with single order active filter circuit, and output end also passes through a resistance R12 and connect with its input cathode, the resistance
R12 also passes through a resistance R8 and connect with voltage follower circuit output end.
4. the high-performance inverter according to claim 1 with single-phase asynchronous motor soft start function, feature exist
In: the single order active filter circuit includes operational amplifier U3C and operational amplifier U3D, and the operational amplifier U3C's is defeated
Enter to hold cathode to connect by a resistance R13 with full-wave rectifying circuit output end, input anode is grounded by a resistance R16,
Its output end is connect by a resistance R147 with the input cathode of operational amplifier U3D, and output end also passes through parallel with one another
Resistance R14, capacitor C43 connect with its input cathode；The input anode of the operational amplifier U3D passes through a resistance
R155 ground connection, input cathode are connect by a resistance R143 with its output end, output end also with restrictor ring circuit connection.
5. the high-performance inverter according to claim 1 with single-phase asynchronous motor soft start function, feature exist
In: the current limliting loop circuit includes operational amplifier U16B and diode V13, the input cathode of the operational amplifier U16B
It is connect by a resistance R148 with single order active filter circuit output end, input anode and resistance R154, resistance R161 connect
It connects, input cathode is also connect with a resistance R145, capacitor C64, and the resistance R145 passes through a capacitor C65 and operation amplifier
The output end of device U16B connects, and the capacitor C64 is connect with the output end of operational amplifier U16B, one end of the resistance R154
It is also connected by capacitor C68, the resistance R161 is also grounded, and the resistance R154 is also connect with 5V power supply；The diode V13
Cathode connect with the output end of operational amplifier U16B, anode by resistance R151 and output controlling elements processing circuit connect
It connects.
6. the high-performance inverter according to claim 1 with single-phase asynchronous motor soft start function, feature exist
In: the output controlling elements processing circuit includes operational amplifier U1C, slide rheostat RP1 and control terminal, the operation
The input cathode of amplifier U1C is connect with the output end of current limliting loop circuit, resistance R21, and input anode passes through a resistance
R23 ground connection, output end are connect with a resistance R80, and output end also passes through a resistance R22 and connect with its input cathode；Institute
The one end for stating slide rheostat RP1 is connect by resistance R95 with 5V power supply, and the other end is grounded by resistance R20, control terminal
It is connect with control terminal；The resistance R21 also pass sequentially through capacitor EC1, resistance R42 ground connection, resistance R21 also with resistance R20
Connection.
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| CN109802600B (en) * | 2019-03-20 | 2021-01-08 | 合肥为民电源有限公司 | Method for starting motor by power frequency inverter and control device |
| CN110474571B (en) * | 2019-08-28 | 2021-04-20 | 华邦创科(惠州市)智能科技有限公司 | Single-phase alternating current phase-shifting starter |
| CN112260530B (en) * | 2020-12-22 | 2021-03-12 | 深圳英集芯科技股份有限公司 | Power supply soft start control circuit, control chip and control device |
| CN117559845B (en) * | 2024-01-09 | 2024-04-26 | 广州市百福电气设备有限公司 | Starting control method and system for water pump motor |
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| EP1315279A2 (en) * | 2001-11-27 | 2003-05-28 | Kim, In-Seok | Voltage-controlled starting relay for induction motor |
| CN103856087A (en) * | 2012-11-30 | 2014-06-11 | 中国北车股份有限公司 | Control method, device and system of single-phase four-quadrant rectifier output voltage |
-
2016
- 2016-09-11 CN CN201610560917.6A patent/CN106208820B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1315279A2 (en) * | 2001-11-27 | 2003-05-28 | Kim, In-Seok | Voltage-controlled starting relay for induction motor |
| CN103856087A (en) * | 2012-11-30 | 2014-06-11 | 中国北车股份有限公司 | Control method, device and system of single-phase four-quadrant rectifier output voltage |
Non-Patent Citations (2)
| Title |
|---|
| 基于DSP改进的三环控制逆变电源设计;罗惠谦等;《仪表技术》;20090131(第1期);第62-64页 * |
| 稳压逆变电源加装软启动电路;徐良辅;《电世界》;20001105(第11期);第19页 * |
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| CN106208820A (en) | 2016-12-07 |
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